Deformable device for positioning a holder
A device positioning an object according to a given direction, including a frame, a holder for holding the object, the holder being movable relative to the frame according to the given direction, a main lever extending between a first point and a second point, said main lever being rotatably mounted to the frame via a first pivot link connecting the main lever and the frame at the first point of the main lever, the main lever being connected to the holder at a third point which is arranged between the first point and the second point, so that a displacement of the second point of the main lever relative to the frame according to the given direction causes displacement of the holder in said given direction.
1. A device for positioning an object according to a given direction, comprising:
a frame,
a holder for holding the object, the holder being movable relative to the frame according to the given direction,
a main lever extending from a first point to a second point, said main lever being rotatably mounted to the frame via a first pivot link connecting the main lever and the frame at the first point of the main lever,
the main lever being connected to the holder at a third point via a second pivot link, the third point being arranged between the first point and the second point, so that a displacement of the second point of the main lever relative to the frame according to the given direction causes displacement of the holder in said direction, said displacement of the holder having a smaller amplitude than an amplitude of the displacement of the second point,
the device comprising a secondary lever connected to the holder via a third pivot link, the secondary lever being connected to the main lever via a fourth pivot link, and being rotatably mounted to the frame via a fifth pivot link, the third pivot link being arranged between the fourth pivot link and the fifth pivot link.
2. The device according to claim 1 , wherein the first pivot link and/or the second pivot link is (are) a torsion spring(s).
3. The device according to claim 1 , made of one single piece of material, the material being notably chosen between a metal and a polymer.
4. The device according to claim 3 , wherein the first pivot link and/or the second pivot link is a narrowing of the material relative to the main lever.
5. The device according to claim 3 , wherein the single piece of material is a material having an ultimate tensile strength over 100 MPa.
6. The device according to claim 1 , further comprising a movable part connected to the main lever(s) at the second point, the movable part being adapted to be displaced in the given direction by an actuator.
7. The device according to claim 1 , wherein the main lever is a first main lever, the device further comprising a second main lever, the first main lever and the second main lever being arranged on two opposite sides of the holder.
8. The device according to claim 7 , wherein the second main lever extends from a first point to a second point, the device further comprising a movable part connected:
to the first main lever at the second point of the first main lever, and
to the second main lever at the second point of the second main lever,
the movable part being adapted to be displaced in the given direction by an actuator.
9. An assembly comprising the device according to claim 7 , and further comprising an actuator configured for moving the second point of the first main lever and the second point of the second main lever at least in said given direction.
10. The assembly according to claim 9 , wherein the actuator is a motorized screw having a tip, the tip being arranged in contact with the movable part so that an actuation of the screw leads to a displacement of the second point of the first main lever and of the second point of the second main lever in the given direction.
11. The device according to claim 1 , wherein the secondary lever is a first secondary lever, the device further comprising a second secondary lever, wherein the first secondary lever and the second secondary lever are arranged on two opposite sides of the holder, each of the first secondary lever and of the second secondary lever being arranged symmetrically on either side of the holder.
12. An assembly comprising the device according to claim 1 , and further comprising an actuator configured for moving the second point at least in said given direction.
13. The assembly according to claim 12 , wherein the actuator is a motorized screw having a tip, the tip being arranged in contact with the movable part so that an actuation of the screw leads to a displacement of the second point in the given direction.
14. The assembly according to claim 12 , wherein the actuator comprises a first part fixed to the frame and a second part, the second part being mobile relative to the first part, and wherein the device further comprises a magnet attached to the second part, and a magnetic field sensor adapted to detect the variation of the magnetic field caused by a movement of the second part.
15. A system comprising the assembly according to claim 14 further comprising a microscope objective, the objective being held by the holder.
16. A use of the assembly according to claim 12 to focus an optical objective, comprising moving the main lever in rotation about the first pivot link.
17. A system comprising the device according to claim 1 further comprising a microscope objective, the objective being held by the holder.
18. A use of the system according to claim 17 to focus an optical objective, comprising moving the main lever in rotation about the first pivot link.
19. A use of the device according to claim 1 to focus an optical objective, comprising moving the main lever in rotation about the first pivot link.